/* ── Summit Stoneworks v3 — advanced motion layer (loads after style.css) ── */

/* scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-deep));
  z-index: 80;
  pointer-events: none;
}

/* nav: hide on scroll down, return on scroll up */
.nav { transition: background calc(0.5s * var(--ms)) var(--ease),
                   box-shadow calc(0.5s * var(--ms)) var(--ease),
                   transform calc(0.55s * var(--ms)) var(--ease); }
.nav.hidden { transform: translateY(-100%); }

/* hero: line settle with micro-rotation */
.hero h1 .line-inner {
  transform: none;
  transform-origin: left bottom;
}
body:not(.is-loaded) .hero h1 .line-inner { transform: translateY(118%) rotate(1.5deg); }

/* hero sub: gold rule draws in underneath */
.hero-sub { position: relative; padding-bottom: 22px; }
.hero-sub::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%) scaleX(1);
  width: 120px;
  height: 2px;
  background: var(--gold);
  transition: transform calc(1.2s * var(--ms)) var(--ease) calc(0.9s * var(--ms));
}
body:not(.is-loaded) .hero-sub::after { transform: translateX(-50%) scaleX(0); transition: none; }

/* section titles: rise + fade reveal (robust — never stays fully hidden) */
h2.sec-title[data-reveal] {
  transform: translateY(48px);
}
h2.sec-title[data-reveal].in-view {
  transform: none;
}

/* collage: drag affordance + tilt */
.collage-viewport { cursor: grab; }
.collage-viewport.dragging { cursor: grabbing; }
.collage-viewport.dragging .collage .tile img,
.collage-viewport.dragging .collage .tile .crop-img { transform: none; }
.collage .tile {
  transform-style: preserve-3d;
  transition: transform calc(0.7s * var(--ms)) var(--ease), box-shadow calc(0.7s * var(--ms)) var(--ease);
}
.collage .tile.tilting { transition: box-shadow calc(0.7s * var(--ms)) var(--ease); }
.collage .tile:hover { box-shadow: 0 18px 40px rgba(16, 14, 16, 0.18); }
.collage-hint {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  font-family: var(--redhat);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}
.collage-hint svg { color: var(--gold-deep); }

.wa-float { will-change: transform; }

/* stone carousel: image wipe + facts cascade */
.stone-img .media-wipe {
  position: absolute;
  inset: 0;
  clip-path: inset(0 100% 0 0);
  transition: clip-path calc(0.9s * var(--ms)) var(--ease);
}
.stone-slide.in .media-wipe { clip-path: inset(0 0 0 0); }
.stone-slide .fact {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity calc(0.7s * var(--ms)) var(--ease) var(--d, 0s),
              transform calc(0.7s * var(--ms)) var(--ease) var(--d, 0s);
}
.stone-slide.in .fact { opacity: 1; transform: none; }
.stone-name-row .stone-name {
  display: inline-block;
}
.stone-name.swap { animation: nameswap calc(0.5s * var(--ms)) var(--ease); }
@keyframes nameswap {
  0% { opacity: 0; transform: translateY(12px); }
  100% { opacity: 1; transform: none; }
}

/* whatsapp float: enters after the hero */
.wa-float {
  opacity: 0;
  transform: translateY(24px) scale(0.8);
  pointer-events: none;
  transition: opacity calc(0.5s * var(--ms)) var(--ease),
              transform calc(0.5s * var(--ms)) var(--ease);
}
.wa-float.show {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

/* partner banner: subtle lift on hover */
.partner .partner-logo { transition: transform calc(0.8s * var(--ms)) var(--ease); }
.partner:hover .partner-logo { transform: translateY(-6px); }

/* topics: check icons pop */
.topic svg {
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
  transition: stroke-dashoffset calc(0.8s * var(--ms)) var(--ease) calc(var(--d, 0s) + 0.25s);
}
.topic.in-view svg { stroke-dashoffset: 0; }

/* motion off guards */
html[data-motion="off"] h2.sec-title[data-reveal] { transform: none; }
html[data-motion="off"] .stone-img .media-wipe { clip-path: inset(0); }
html[data-motion="off"] .stone-slide .fact { opacity: 1; transform: none; }
html[data-motion="off"] .topic svg { stroke-dashoffset: 0; }
html[data-motion="off"] .wa-float { opacity: 1; transform: none; pointer-events: auto; }
@media (prefers-reduced-motion: reduce) {
  h2.sec-title[data-reveal] { transform: none !important; }
  .stone-img .media-wipe { clip-path: inset(0) !important; }
  .stone-slide .fact, .wa-float { opacity: 1 !important; transform: none !important; }
  .wa-float { pointer-events: auto !important; }
  .topic svg { stroke-dashoffset: 0 !important; }
}

/* ── mobile nav: hamburger + slide-down panel ──────────────────── */
.nav-toggle {
  display: none;
  flex: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 0;
  cursor: pointer;
  z-index: 2;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--paper);
  transition: transform calc(0.3s * var(--ms)) var(--ease),
              opacity calc(0.2s * var(--ms)) var(--ease),
              background calc(0.4s * var(--ms)) var(--ease);
}
.nav.scrolled .nav-toggle span,
.nav.open .nav-toggle span { background: var(--ink); }
.nav.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1080px) {
  .nav-toggle { display: flex; }
  .brand { height: 48px; }
  .nav-inner { position: relative; }
  .nav-links {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: rgba(248, 248, 243, 0.98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 14px;
    box-shadow: 0 16px 36px rgba(16, 14, 16, 0.18);
    padding: 10px;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity calc(0.3s * var(--ms)) var(--ease),
                transform calc(0.3s * var(--ms)) var(--ease),
                visibility 0s linear calc(0.3s * var(--ms));
  }
  .nav.open .nav-links {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: opacity calc(0.3s * var(--ms)) var(--ease),
                transform calc(0.3s * var(--ms)) var(--ease);
  }
  .nav-links a { display: block; color: var(--ink); padding: 14px 16px; font-size: 17px; }
  .nav-links a:not(.btn)::after { display: none; }
  .nav-links .btn-gold { margin-top: 6px; text-align: center; padding: 15px 26px; }
}

/* ── footer credit: very low contrast ──────────────────────────── */
.footer-by { text-align: center; margin-top: 18px; }
.footer-by a {
  font-family: var(--redhat);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(248, 248, 243, 0.22);
  transition: color calc(0.3s * var(--ms)) var(--ease);
}
.footer-by a:hover { color: rgba(248, 248, 243, 0.55); }

/* small phones: shrink brand further so the hamburger always fits */
@media (max-width: 480px) {
  .brand { height: 40px; }
  .nav-inner { width: calc(100% - 40px); }
}

/* ══ mobile refinements: tighter gutters, native collage scroll, slider ══ */
@media (max-width: 1080px) {
  /* less side gutter so content isn't cramped */
  .wrap { width: calc(100% - 32px); }
  .nav-inner { width: calc(100% - 32px); }
  .contact-card { padding: 30px 20px; }
  .stone-card { padding: 40px 18px 34px; }

  /* mountain backdrop: on narrow screens it rendered short and got fully hidden
     behind the .projects overlap — enlarge it and cut the overlap so it shows */
  .why { padding-bottom: 200px; }
  .why-pattern { background-size: 160% auto; opacity: 0.6; }
  .projects { margin-top: -130px; }

  /* collage: native horizontal scroll (no JS drag hijacking page scroll) */
  .collage-viewport {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
    cursor: default;
    scroll-snap-type: x proximity;
    scroll-padding-inline: 16px;
  }
  .collage { transform: none !important; will-change: auto; }
  .collage .tile { scroll-snap-align: center; }
  .collage-viewport::-webkit-scrollbar { height: 0; }

  /* stone slider: drop side arrows (overlapped text), bigger image, swipe + dots */
  .stone-arrow { display: none; }
  .stone-viewport { gap: 0; display: block; }
  .stone-stage { touch-action: pan-y; }
  .stone-slide { grid-template-columns: 1fr; gap: 22px; }
  .stone-img { aspect-ratio: 16 / 10; }
  .stone-dots { gap: 16px; margin-top: 28px; }
  .stone-dot { width: 13px; height: 13px; }
}

@media (max-width: 480px) {
  .wrap { width: calc(100% - 28px); }
  .nav-inner { width: calc(100% - 28px); }
  .contact-card { padding: 26px 16px; }
  .stone-card { padding: 34px 14px 30px; }
  .stone-name { letter-spacing: 0.22em; }
}

/* ══ lightbox / image zoom ══ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(16, 14, 16, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0s linear 0.3s;
}
.lightbox.open {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s var(--ease);
}
.lightbox img {
  max-width: 92vw;
  max-height: 86vh;
  border-radius: 10px;
  object-fit: contain;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  transform: scale(0.95);
  transition: transform 0.3s var(--ease);
}
.lightbox.open img { transform: scale(1); }
.lightbox-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 0;
  cursor: pointer;
  background: rgba(248, 248, 243, 0.14);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: background 0.3s var(--ease);
}
.lightbox-close:hover { background: rgba(248, 248, 243, 0.28); }
.collage .tile img, .collage .tile .crop-img { cursor: zoom-in; }
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 0;
  cursor: pointer;
  background: rgba(248, 248, 243, 0.14);
  color: #fff;
  font-size: 30px;
  line-height: 1;
  display: grid;
  place-items: center;
  z-index: 2;
  transition: background 0.3s var(--ease);
}
.lightbox-nav:hover { background: rgba(248, 248, 243, 0.28); }
.lightbox-nav.prev { left: 14px; }
.lightbox-nav.next { right: 14px; }
@media (max-width: 560px) {
  .lightbox-nav { top: auto; bottom: 22px; transform: none; width: 44px; height: 44px; font-size: 26px; }
  .lightbox-nav.prev { left: 28px; }
  .lightbox-nav.next { right: 28px; }
}
html[data-motion="off"] .lightbox, html[data-motion="off"] .lightbox img { transition: none; }

/* ══ footer: smaller logo (was oversized on desktop & mobile) + centered on mobile ══ */
.footer-logo img { width: clamp(140px, 12vw, 190px); }
@media (max-width: 1080px) {
  .footer-grid { justify-items: center; text-align: center; }
  .footer-logo img { width: 120px; }
  .footer .fcol { justify-items: center; }
  .footer .ci-group { justify-items: center; }
  .footer .ci-row { justify-content: center; }
  .footer .socials { justify-content: center; }
  .footer-note { justify-content: center; text-align: center; }
}